ZeroHookZeroHook
Free DNS Visualizer

DNS Visualizer &
Dependency Map.

Visualize your entire DNS architecture, highlight security vulnerabilities, and map external dependencies. In real time. Free, no signup required.

example.com · DNS audit
Complete
74score

Security Score

3 issues found. 2 critical fixes available.
2 fail1 warn3 pass
SPF Record
DKIM Signing
DMARC Policy
MX Records
DNSSEC
MTA-STS

Critical: DMARC not enforced: Domain spoofable.

Copy-Paste Fix

Enable DMARC

Add TXT to _dmarc subdomain.

v=DMARC1; p=quarantine;
What Attackers See

35 checks on paid tiers. Every attack vector covered.

Free scan checks the 4 most exploited DNS vulnerabilities. 76% of domains fail at least one.

Email Spoofing

Without enforced DMARC, attackers send phishing emails that appear to come from your domain. 91% of attacks start here.

DNS Hijacking

Missing DNSSEC means visitors can be silently redirected to fake login pages. Credential theft you never detect.

Email Tampering

Without DKIM, attackers modify your emails in transit. Invoices, contracts, wire transfers: All can be altered.

Domain Blacklisting

One misconfiguration and your domain hits 50+ blacklists. Your emails stop reaching customers overnight.

Brand Impersonation

Attackers register look-alike domains (typosquatting) to phish your customers. 87% of brands have at least one impersonator.

Compliance Failures

Missing SPF/DKIM/DMARC violates GDPR, NIS2, PCI-DSS requirements. Fines start at €10M and you can't prove compliance.

Go beyond one-off scans

Fix issues before they affect customers

Get automated monitoring, real-time alerts, and continuous scanning.

Free Account

  • Copy-paste DNS fixes
  • Daily automated scans
  • Real-time alerts
  • Full security audit
Deliverability

Full monitoring

  • Copy-paste DNS fixes
  • Daily automated scans
  • Real-time alerts
  • Full security audit

Free forever plan available · Paid plans from $29/mo